<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <!-- 
        对象中的属性名，都是字符串
        对象属性的操作，有两种语法
     -->
    <script>
        let a='name'
        let b='tom'

        let person={}  //{name:'tom'}

        person['a']=b

        console.log(person);
    </script>
</body>
</html>